期刊
OPTICAL MATERIALS EXPRESS
卷 3, 期 8, 页码 1127-1136出版社
OPTICAL SOC AMER
DOI: 10.1364/OME.3.001127
关键词
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资金
- NSFC [51072065, 61178073, 60908031, 60908001, 61077033]
- Program for NCET in University [NCET-08-0243]
- State Key Laboratory on Integrated Optoelectronics
- Tsinghua National Laboratory for Information Science and Technology (TNList) Cross-discipline Foundation
Heavily erbium-doped low-hydroxyl fluorotellurite glasses with molar compositions of (85.7-x)TeO2 + xBaF(2) + 4.8Na(2)CO(3) + 9.5Er(2)O(3) (x = 38.1, 28.6, 19) were fabricated. The maximum doping concentration of erbium ions was up to 19 mol % by introducing BaF2 into the tellurite glass system. Under 980 nm excitation, intense emissions around 2.7 mu m from the I-4(11/2) -> I-4(13/2) transition of Er3+ ions were observed in these glasses. The efficient mid-infrared emission can be attributed to the existence of cross relaxation (CR) I-4(13/2) -> I-4(15/2) (Er3+): I-4(13/2) -> I-4(9/2) (Er3+) caused by high erbium concentration, low hydroxyl content, and low phonon energy. The stimulated emission cross section at 2.7 mu m of 47.6TeO(2) + 38.1BaF(2) + 4.8Na(2)CO(3) + 9.5Er(2)O(3) glass was calculated as 1.94 x 10(-20) cm(2). Our results indicate that it is a promising gain medium for 2.7 mu m lasers. (C) 2013 Optical Society of America
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